Hawk mikuni carb set up

Rail32 · 03-17-2017, 08:27 AM

I first tried to tune stock carb , but found out the pilot jet is a hard find . So I ordered a VM26 last nite . Looking for close set up for jets and air screw mix to save time , and because I am basicly lazy and wanna ride rather than tune .
Aftermarket pipe , open air box with Uni filter , and 250 miles on her .
I have the jet kit and thinking 120 main and 1 1/2 air screw out , needle 2 down spacing , but pilot is where I am not informed yet . Suggestions to my thinking and what pilot to I get coming ?
BTW flat land Wi so like low sea level settings . Can one but a pilot jet assortment anymore ?? I am about 20 years out of carb tuning , I was in shape and had hair back in those days.

chuck · 03-17-2017, 09:05 AM

Quote:

Originally Posted by Rail32

I first tried to tune stock carb , but found out the pilot jet is a hard find . So I ordered a VM26 last nite . Looking for close set up for jets and air screw mix to save time , and because I am basicly lazy and wanna ride rather than tune .
Aftermarket pipe , open air box with Uni filter , and 250 miles on her .
I have the jet kit and thinking 120 main and 1 1/2 air screw out , needle 2 down spacing , but pilot is where I am not informed yet . Suggestions to my thinking and what pilot to I get coming ?
BTW flat land Wi so like low sea level settings . Can one but a pilot jet assortment anymore ?? I am about 20 years out of carb tuning , I was in shape and had hair back in those days.

I have a 30 pilot and 120 main jet on mine with similar mods and it's been running good.

Ariel Red Hunter · 03-17-2017, 09:18 AM

Quote:

Originally Posted by chuck

I have a 30 pilot and 120 main jet on mine with similar mods and it's been running good.

That sounds about right...ARH

Rail32 · 03-17-2017, 10:03 AM

Thanks guys , heading to local Kawasaki , Yamaha , suzuzuki dealer this morning and ordering me the pilot . Thanks , gotta love ya guys !!

oldscooter · 03-17-2017, 03:35 PM

I put my mikuni on today. Set it up with the factory 20 pilot and a 115 main. 1 1/2 out on the A/F screw. Needle in the middle slot. I have the "air box mod" and a gutted cat. So I'm not getting as much air as Rail32. I'd give it a try but it's time for me to go do adult stuff.

Rail32 · 03-17-2017, 05:50 PM

Quote:

Originally Posted by oldscooter

I put my mikuni on today. Set it up with the factory 20 pilot and a 115 main. 1 1/2 out on the A/F screw. Needle in the middle slot. I have the "air box mod" and a gutted cat. So I'm not getting as much air as Rail32. I'd give it a try but it's time for me to go do adult stuff.

How sad for you !

I terrorized the neighborhood ditches , my lawn , woods is awe fully soupy , and a kick spin uptown as soon as most of the snow melted of the roads . That's about as adult as I get

oldscooter · 03-17-2017, 08:52 PM

ARH has this post at around 12 today. http://www.chinariders.net/showthrea...468#post247468

Azhule · 03-19-2017, 11:21 AM

That idle speed screw on the side of the carb will most likely be off at 1-1/2 turns out.

The 1-1/2 turns out recommendation is for the Pilot Screw (bottom of carb) starting point

oldscooter · 03-19-2017, 11:47 AM

Thanks for the suggestions. I've read several posts and it seems the term for idle screw is used for both screws. Carbs puzzle me. I'll attack the mikuni again later this week when the new pilot jets arrive. Back to stock for now to get in some riding on the warm days ahead.

Ariel Red Hunter · 03-19-2017, 11:56 AM

Quote:

Originally Posted by oldscooter

Thanks for the suggestions. I've read several posts and it seems the term for idle screw is used for both screws. Carbs puzzle me. I'll attack the mikuni again later this week when the new pilot jets arrive. Back to stock for now to get in some riding on the warm days ahead.

I'm 99% sure that I always have mentioned the idle mixture screw. On a Mikuni, the idle speed screw is on the opposite side of the carb. Important to understand the difference between idle mixture and idle speed. The idle speed screw only raises or lowers the slide. The idle mixture screw only controls the fuel mixture at idle.....ARH

oldscooter · 03-19-2017, 12:26 PM

I like it when ARH chimes in on carb posts. Out of all the articles I've read, Youtube's I've watched, he is the only one that has made sense to me. So one more time for us slow kids. The idle speed screw is on the right side of the carb (pic 1). The same place as the "knob" that adjusts the idle speed on the stock carb. The idle mixture screw is on the bottom of the carb (pic 2). Set idle mixture screw 1 1/2 turns out to start. Give me two weeks and I should be done with this.

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Ariel Red Hunter · 03-19-2017, 05:15 PM

Quote:

Originally Posted by oldscooter

I like it when ARH chimes in on carb posts. Out of all the articles I've read, Youtube's I've watched, he is the only one that has made sense to me. So one more time for us slow kids. The idle speed screw is on the right side of the carb (pic 1). The same place as the "knob" that adjusts the idle speed on the stock carb. The idle mixture screw is on the bottom of the carb (pic 2). Set idle mixture screw 1 1/2 turns out to start. Give me two weeks and I should be done with this.

Attachment 9025

Attachment 9026

I some how got the idea you were asking about a Mikuni carburetor. The one in the picture is not a Mikuni. Or if it is, it's not like any Mikuni I ever worked on. That looks like a Kiehin pz30. Or a copy there of. Mikuni main jets will work in that carb, but the Mikuni pilot jet won't....ARH

hertz9753 · 03-19-2017, 08:41 PM

I also have the copy. I have a VM32 spigot mount on my 1980 KX125. It is stock and uses a rubber adapter to hold the reed valve cage in and hose clamp to attach the carb to it.

oldscooter · 03-19-2017, 09:30 PM

I was feeling bad about hijacking the thread. Glad this info is helpful to others. So I'll use ARH's instructions with this carb and see what happens. I'm confused enough about carbs and now I'm going down a side street with knock offs. I saw mikuni on the side of the carb and thought it was real. Naive redneck no understand Chinese business practices.

Ariel Red Hunter · 03-19-2017, 09:46 PM

Quote:

Originally Posted by oldscooter

I was feeling bad about hijacking the thread. Glad this info is helpful to others. So I'll use ARH's instructions with this carb and see what happens. I'm confused enough about carbs and now I'm going down a side street with knock offs. I saw mikuni on the side of the carb and thought it was real. Naive redneck no understand Chinese business practices.

If it will accept Mikuni pilot jets, and has a five slot needle, it will work for you. You probably don't need the other Mikuni features, which I have explored on Hawk Talk...ARH

03-17-2017, 08:27 AM	#1
Rail32 Join Date: Feb 2017 Location: Marshfield , Wi Posts: 129	Hawk mikuni carb set up I first tried to tune stock carb , but found out the pilot jet is a hard find . So I ordered a VM26 last nite . Looking for close set up for jets and air screw mix to save time , and because I am basicly lazy and wanna ride rather than tune . Aftermarket pipe , open air box with Uni filter , and 250 miles on her . I have the jet kit and thinking 120 main and 1 1/2 air screw out , needle 2 down spacing , but pilot is where I am not informed yet . Suggestions to my thinking and what pilot to I get coming ? BTW flat land Wi so like low sea level settings . Can one but a pilot jet assortment anymore ?? I am about 20 years out of carb tuning , I was in shape and had hair back in those days. __________________ Living life to the fullest to avoid regrets later ,,,,or I am a complete loon ! Either way I am good
	0

03-17-2017, 10:03 AM	#4
Rail32 Join Date: Feb 2017 Location: Marshfield , Wi Posts: 129	Thanks guys , heading to local Kawasaki , Yamaha , suzuzuki dealer this morning and ordering me the pilot . Thanks , gotta love ya guys !! __________________ Living life to the fullest to avoid regrets later ,,,,or I am a complete loon ! Either way I am good
	0

03-19-2017, 11:21 AM	#8
Azhule Join Date: Dec 2015 Location: CO Posts: 1,525	That idle speed screw on the side of the carb will most likely be off at 1-1/2 turns out. The 1-1/2 turns out recommendation is for the Pilot Screw (bottom of carb) starting point __________________ "Think as you like... but this self proclaimed Professor is always right" - Buckshot "You never know what someone is hiding beneath their smile..." - NinjaTom - R.I.P.
	1

03-19-2017, 08:41 PM	#13
hertz9753 Join Date: May 2016 Location: Bismarck, ND Posts: 868	I also have the copy. I have a VM32 spigot mount on my 1980 KX125. It is stock and uses a rubber adapter to hold the reed valve cage in and hose clamp to attach the carb to it. __________________ 2015 and 3/4 RPS Hawk 250. Most people would call it a 2016 but the MCO didn't.
	1

03-17-2017, 03:35 PM	#5
oldscooter Join Date: Feb 2017 Location: North Alabama Posts: 62	I put my mikuni on today. Set it up with the factory 20 pilot and a 115 main. 1 1/2 out on the A/F screw. Needle in the middle slot. I have the "air box mod" and a gutted cat. So I'm not getting as much air as Rail32. I'd give it a try but it's time for me to go do adult stuff.
	0

03-17-2017, 08:52 PM	#7
oldscooter Join Date: Feb 2017 Location: North Alabama Posts: 62	ARH has this post at around 12 today. http://www.chinariders.net/showthrea...468#post247468
	0

03-19-2017, 11:47 AM	#9
oldscooter Join Date: Feb 2017 Location: North Alabama Posts: 62	Thanks for the suggestions. I've read several posts and it seems the term for idle screw is used for both screws. Carbs puzzle me. I'll attack the mikuni again later this week when the new pilot jets arrive. Back to stock for now to get in some riding on the warm days ahead.
	1

03-19-2017, 12:26 PM	#11
oldscooter Join Date: Feb 2017 Location: North Alabama Posts: 62	I like it when ARH chimes in on carb posts. Out of all the articles I've read, Youtube's I've watched, he is the only one that has made sense to me. So one more time for us slow kids. The idle speed screw is on the right side of the carb (pic 1). The same place as the "knob" that adjusts the idle speed on the stock carb. The idle mixture screw is on the bottom of the carb (pic 2). Set idle mixture screw 1 1/2 turns out to start. Give me two weeks and I should be done with this.
	0

03-19-2017, 09:30 PM	#14
oldscooter Join Date: Feb 2017 Location: North Alabama Posts: 62	I was feeling bad about hijacking the thread. Glad this info is helpful to others. So I'll use ARH's instructions with this carb and see what happens. I'm confused enough about carbs and now I'm going down a side street with knock offs. I saw mikuni on the side of the carb and thought it was real. Naive redneck no understand Chinese business practices.
	0